Russian Foreign Minister Sergei Lavrov called on Sunday for the dismantling of a remote camp for displaced people along the Syria-Jordan border.
"We support the (Rukban) camp to be dismantled as soon as possible," Lavrov said during a visit to Amman.
Rukban has a population of over 40,000, whom the UN says are stranded in dire conditions. The last aid delivered there was two months ago. UN officials say most of the camp's residents want to leave but fear for their security and need more safety guarantees.
The camp lies near a US military base and within a de-confliction zone set up between Washington and Moscow.
Russia has accused Washington of denying humanitarian access to the camp, allegations denied by the US.
Speaking alongside his Jordanian counterpart Ayman Safadi, Lavrov said Moscow was ready to discuss "all steps needed" to help people leave Rukban.
"The most simple and effective solution would be to end the American occupation," he said.
Hedinn Halldorsson, a spokesman for the UN Office for the Coordination of Humanitarian Affairs, said the UN is "in discussions and facilitating dialogue with and between all relevant parties," adding that "the US military has not presented any obstacles in terms of access or aid to Rukban."
At least 400 Rukban residents left Sunday toward shelters provided by the Syrian regime in the central Homs province. A total of 1,660 have left since March 24, Halldorsson said.